Mozilla Labs crowned their picks of best new and updated Firefox 3 extensions in a recent contest, but what about best extensions of all time? Last year we ran down our must-have Firefox extensions, but it's time for a refresh, this time with a little help from my friends. Yesterday I polled over 4,000 of my closest and most personal internet buddies about what extensions they absolutely must have installed to work comfortably in their favorite browser. Almost 100 responses later, we've g